Marc Singer, M.D.
NPI 1194732909ActiveIndividual· Colon & Rectal Surgery· Chicago, IL
Colon & Rectal Surgery (M.D.) in Chicago, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1997). In 2024 Medicare paid $69,999 for 222 patients, and Part D covered 243 of their prescriptions, 75% of them generic. Ethicon US, LLC was the largest of 2 companies reporting payments in 2025, $931.75 in all, mostly food and beverage.
Overview
| NPI | 1194732909 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 2, 2006 |
| Last updated in NPPES | May 4, 2021 |
| Certified by provider | May 4, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Colon & Rectal Surgery Primary | 208C00000X | 036100526 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Colorectal Surgery (Proctology) (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 222 |
|---|---|
| Services billed | 486 across 59 procedure codes |
| Paid by Medicare | $69,999 |
Part D prescriptions in 2024
| Prescriptions (claims) | 243 · 260 30-day fills |
|---|---|
| Patients | 107 |
| Total drug cost | $9,056 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Colorectal Surgery (Proctology) |
| Secondary specialties | General Surgery |
Medical groups
- Loyola University Medical CenterMaywood, IL · 953 clinicians
- Chesterton Physical Therapy IncChesterton, IN · 186 clinicians
Hospital affiliations
- Loyola University Medical CenterMaywood, IL
- Uchicago Medicine Adventhealth la GrangeLa Grange, IL
Other facilities
- Loyola Medicine Home CareHome health agency · Oak Brook, IL
Industry payments (Open Payments)
- 2025$931.75 · 7 payments from 2 companies
- 2024$5,172 · 17 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ethicon US, LLC | $846.05 | 6 |
| Solventum Corporation | $85.70 | 1 |
What the 2025 payments were for
- Food and Beverage$471.75 · 6 payments
- Consulting Fee$460.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 48 colorectal surgeons in Chicago · All colorectal surgeons in Illinois